Device for collecting sediment in steam-boilers.



E. P. HEWITT.

DEVICE FOR COLLECTING SEDIMENT IN STEAM BOILERS.

APPLICATION IILED FEB.16, 1912.

1,035,877. Patented Aug. 20, 1912.

2 SHEETS-SHEET 1.

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DEVICE FOR COLLECTING SEDIMENT IN STEAM BOILERS.

APPLICATION FILED rmme, 1912.

1,035,877. Patented Aug. 20, 1912.

2 SHEETS-SHEET B.

OOLUMBIA PLANDOIAPH 50., wIuMlNaroN. n. c.

EDWIN P. HEWITT, OF SPOKANE, WASHINGTON.

DEVICE FOR COLLECTING SEDIMENT IN STEAM-BOILERS.

Specification of Letters Patent.

Patented A11 20, 1912.

Application filed February 16, 1912. Serial No. 678,082.

To all whom it may concern Be it known that I, EDWIN P. Hnwi'r'r, acitizen of the United States, residing at Spokane, in the county ofSpokane and State of \Vashington, have invented certain new and usefulImprovements in Devices for Collecting Sediment in Steam-Boilers; and Ido hereby declare the following to he a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

This invention relates to devices for collecting sediment in steamboilers and. the object is to provide improved means for separating thesediment from the water as it enters through the feed pipe andcollecting such sediment below the separating device in a chamber fromwhich it may readily be blown off.

A further object is to provide means for collecting oil which may beadmitted with the water and retaining the same in pockets suitablylocated in the sediment collect-or.

WVith these and other objects in view the invention consists in thenovel construction hereinafter described and claimed.

Briefly described, the invention includes a collecting device in theform of a partly cylindrical member mounted within the boiler andbeneath the fire or smoke tubes, with a trough-like member formed in theupper portion of the cylindrical device and separated therefrom by aperforated partition member. The partition member carries devicesintended to form pockets for retaining oil which may be admitted withthe water.

' The lower cylindrical member is connected with a source of watersupply and upon opening suitable valves the pressure within the boileroperates to blow off the sediment from the collector, suitable meansbeing provided for properly directing the pressure within thecylindrical member for the purpose stated.

In the accompanying drawings forming part of this application :Figure 1is a view partly in vertical section and partly in elevation of a boilerand boiler setting, showing my improved device in operative position.Fig. 2 is a sectional View of the boiler with the collector properlymounted therein. Fig. 3 is a view of the furnace structure in frontelevation. Fig. 4 is a perspective view of the separating and collectingdevice. Fig. 5 is a top plan View. Fig. 6 is a View in verticaltransverse section. Fig. 7 is a view in elevation of one of the oilcollecting devices carried by the perforated partition member separatingthe trough and the cylindrical member. Fig. 8 is a vertical section ofone end of the cylindrical member showing a battle plate therein.

In carrying out my invention, I mount the device in a boiler of ordinaryconstruction such as 10, the boiler being located within furnacestructure 15. A manhole 16 is provided for the purpose of admitting thesediment collector, and the upper outer doors are indicated by 17 and 18and the lower doors by 19, 20, 21 and 22.

The separating and collecting device is shown in detail in Figs. 1, 5and 6 and comprises a lower receptacle 25, which may be partlycylindrical in cross section, and an upper trough-like member 26 whichmay be formed by bending the walls of the cylindrical member so that theupper portions there of will be flared outwardly and if desirablesuitably curved to form the trough. The lower portion of the trough isin the form of a concave partition member 27 which may be riveted to thesides of the device specified, just above the bond 28. Perforations 29which may vary in size, as shown in Fig. 5, are formed in member 27 andconnected with these perforations are nipples or cuplike devices 50,shown in detail in Fig. 7 and provided with upper threaded portions 51and with a hexagonal portion 52 to facilitate the placing of the devicesin position. These devices 50 are intended to retain the oil which maybe admitted with the water and which will float in the upper portion ofthe cylindrical receptacle 25. At one end of receptacle 25 a battleplate 55 is located, being suitably supported by means of a stem 56 andprovided with apertures 57. Upon opening the blow'ofi described below,boiler pressure will be admitted by means of aperture 58 normally closedby trap 59 and will cause the sediment within receptacle 25 to bedischarged through the pipe 30. The baffle plate causes the pressure tobe exerted especially at points adjacent the walls of the cylinder andinsures thorough cleaning. The supply pipe is indicated by 30 and isconnected with receptacle 25 at the point 31. Feed pipe 32 is connectedindirectly with pipe 30 and is supplied with valves 33, 34 and 35, thelatter constituting a blow-off valve, by means of which the sediment isdischarged from receptacle 25 after the water has been cut off by valves33 and 34. Extending between valve 35 and the boiler head 36 is a pipe37 which connects with pipe 38 passing through the boiler head and isjoined to pipe 39 by means of a union 40. After the sediment collectingdevice has been inserted through manhole 16, it is only necessary toconnect the pipes 30 and 39 by means of union 40 in order that theapparatus may be placed in operation.

Referring to Fig. 2, it will be observed that arms 45 support thecollecting device proper and that these arms are in turn sup ported bystay rods 46.

Further describing the operation, it may be stated that water isadmitted through the supply pipe and passes from receptacle 25 throughperforations 29 into trough member 26 which is open at its upper sideand provides for the admission and circulation of water already in theboiler. The action of the partly heated water entering the boiler andmeeting the heated water already in the boiler causes a chemical actionwhich will separate the foreign matter from the water, allowing it toform in a trough and to pass through the apertures into the lowerchamber where it remains until the blow-off valve is opened. The latterallows the sediment and other matter to be expelled from the water bythe pressure within the boiler. The oil, as previously intimated, willbe blown off during this operation.

hat I claim is:

1. In a device of the class described, an upper receptacle adapted to belocated in a steam boiler, said receptacle constituting a trough andhaving a bottom provided with perforations, a lower receptacle havingimperforate side walls, means for feeding water under pressure to theboiler through the lower receptacle and through the upper receptacle,and means permitting the discharge of sediment from the lower receptaclethrough the means for feeding the boiler and by direct boiler pressurewhen the pressure first mentioned is reduced.

2. In a device of the class described, a plurality of receptaclesseparated by a perforated partition, means for supporting thereceptacles in a steam boiler, means for admitting water to one of thereceptacles and for effecting the discharge of sediment therefrom, suchpartition acting as a separating device for sediment and a preliminarycollecting device, and oil retaining devices carried by the partition.

3. In a device of the class described, a boiler and a separating devicelocated therein said device last mentioned including upper and lowerreceptacles, a perforated partition separating the receptacles, oilretaining devices carried by the partition, means for admitting water tothe lower receptacle, a feed pipe connected with said means, a valve inthe feed pipe, and a blowoff valve also connected with the feed pipe,the latter admitting water to the lower receptacle, and the blow-offvalve permitting the discharge of sediment therefrom when the feed isstopped.

4. In a device of the class described, an upper receptacle located inthe steam boiler and arranged to permit the free circulation therein ofthe water in said boiler, a lower receptacle, a perforated partitionmember between the receptacles, nipples constituting oil retainingdevices secured to the parti tion member and connected thereto at pointsregistering with the apertures, and means for admitting water to thelower receptacle.

5. In a device of the class described, an upper receptacle constitutinga trough and having a bottom with graduated perforations therein,nipples registering with the perforations, a lower receptacle havingimperforate side walls located beneath the trough, means for feedingwater under pressure to the boiler through the receptacles, and meanspermitting the discharge of sediment from the lower receptacle by directboiler pressure upon reducing the pressure first mentioned.

6. In a device of the class described, a receptacle arranged to belocated within a steam boiler and having connection with a water supplypipe, means connected with the receptacle for preventing the passage ofsediment to the boiler, means for admitting boiler pressure to thereceptacle, and a perforated plate the outer edges of which tend toconverge with the surface of the inner walls of the receptacle fordistributing said pressure about such walls.

7.'In a device of the class described, a receptacle arranged to belocated within a steam boiler and having connection with a water supplypipe, means connected with the receptacle for preventing the passage ofsediment to the boiler, means for admitting boiler pressure to the recetacle, and a perforated baffle plate having a concave surface the outerportion of which plate tends to converge with the inner surface of thewalls of the receptacle for the purpose of distributing fluid about suchsurface.

In testimony whereof I afiiX my signature in presence of two witnesses.

EDI/VIN P. HE WITT.

H. W. SMITH.

Qopies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents Washington, D. C.'

